package com.sky.service.impl;


import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.OrdersPageQueryDTO;
import com.sky.dto.OrdersPaymentDTO;
import com.sky.dto.OrdersSubmitDTO;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collectors;

@Slf4j
@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private WebSocketServer webSocketServer;

    //
    @Transactional
    @Override
    public OrderSubmitVO sumbitorder(OrdersSubmitDTO ordersSubmitDTO) {

        //向订单表插入一条数据(地址为空，购物车数据为空)
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook == null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //用户
        Long userId = BaseContext.getCurrentId();

        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);

        if(shoppingCartList == null || shoppingCartList.size() == 0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);




        orders.setUserId(userId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setAddress(addressBook.getProvinceName()+addressBook.getCityName()+addressBook.getDistrictName());

        orderMapper.insert(orders);


        List<OrderDetail> orderDetailList = new ArrayList<>();


        //向订单明细表插入多条数据
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());

            orderDetailList.add(orderDetail);
        }

        orderDetailMapper.insertBench(orderDetailList);

        //清空用户当前用户的购物车数据
        shoppingCartMapper.delete(shoppingCart);

        //封装Vo返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);


        //通过websocket向客户端浏览器推送消息
        Map map = new HashMap();
        map.put("type",1);
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号" + outTradeNo);

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }

    @Override
    public PageResult pageQuery(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        List<OrderVO> orderList = orderMapper.pageQuery(ordersPageQueryDTO);

        // 如果订单列表为空，直接返回空的分页结果
        if (orderList == null || orderList.isEmpty()) {
            Page<OrderVO> page = new Page<>();
            return new PageResult(page.getTotal(), page.getResult());
        }

        //1.提取订单列表
        List<Long> orderIds = orderList.stream()
                .map(OrderVO::getId)
                .collect(Collectors.toList());


        log.info("查到的订单id" + orderIds);
        //2.查询全部订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.selectByOrderIds(orderIds);

        //按照订单id分类
        Map<Long, List<OrderDetail>> orderDetailMap = orderDetailList.stream()
                .collect(Collectors.groupingBy(OrderDetail::getOrderId));

        //填充到每个OrderVO
        for (OrderVO orderVO : orderList) {
            List<OrderDetail> details = orderDetailMap.get(orderVO.getId());
            orderVO.setOrderDetailList(details == null ? Collections.emptyList() : details);

            // 拼接菜品名称为字符串，如 "宫保鸡丁, 麻婆豆腐, 可乐"
            String dishNames = Optional.ofNullable(details).orElse(Collections.emptyList()).stream()
                    .map(OrderDetail::getName) // 假设 OrderDetail 有 getDishName() 方法
                    .filter(Objects::nonNull)     // 过滤掉 null 的 dishName
                    .collect(Collectors.joining(", "));

            orderVO.setOrderDishes(dishNames);
        }
        Page<OrderVO> page = (Page<OrderVO>) orderList;
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    public OrderVO getById(Long id) {
        OrderVO orderVO = orderMapper.getById(id);
        List<Long> list = new ArrayList<>();
        list.add(id);
        List<OrderDetail> details = orderDetailMapper.selectByOrderIds(list);

        orderVO.setOrderDetailList(details == null ? Collections.emptyList() : details);
        return orderVO;
    }

    @Override
    public OrderStatisticsVO statistics() {
        OrderStatisticsVO orderStatisticsVO = orderMapper.statistics();
        return orderStatisticsVO;
    }

    @Override
    public void update(Orders orders) {
        orderMapper.update(orders);
    }

    @Override
    public void reminder(Long id) {
        OrderVO orderVO = orderMapper.getById(id);

        if(orderVO == null){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Map map = new HashMap();
        map.put("type",2);
        map.put("orderId",orderVO.getId());
        map.put("content","订单号" + orderVO.getId());



        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
}
